Commit | Line | Data |
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c94c2acf MW |
1 | #ifndef _LINUX_DAX_H |
2 | #define _LINUX_DAX_H | |
3 | ||
4 | #include <linux/fs.h> | |
5 | #include <linux/mm.h> | |
6 | #include <asm/pgtable.h> | |
7 | ||
8 | ssize_t dax_do_io(struct kiocb *, struct inode *, struct iov_iter *, loff_t, | |
9 | get_block_t, dio_iodone_t, int flags); | |
10 | int dax_clear_blocks(struct inode *, sector_t block, long size); | |
11 | int dax_zero_page_range(struct inode *, loff_t from, unsigned len, get_block_t); | |
12 | int dax_truncate_page(struct inode *, loff_t from, get_block_t); | |
13 | int dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t, | |
14 | dax_iodone_t); | |
15 | int __dax_fault(struct vm_area_struct *, struct vm_fault *, get_block_t, | |
16 | dax_iodone_t); | |
d1a5f2b4 DW |
17 | |
18 | #ifdef CONFIG_FS_DAX | |
19 | struct page *read_dax_sector(struct block_device *bdev, sector_t n); | |
20 | #else | |
21 | static inline struct page *read_dax_sector(struct block_device *bdev, | |
22 | sector_t n) | |
23 | { | |
24 | return ERR_PTR(-ENXIO); | |
25 | } | |
26 | #endif | |
27 | ||
844f35db MW |
28 | #ifdef CONFIG_TRANSPARENT_HUGEPAGE |
29 | int dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, | |
30 | unsigned int flags, get_block_t, dax_iodone_t); | |
31 | int __dax_pmd_fault(struct vm_area_struct *, unsigned long addr, pmd_t *, | |
32 | unsigned int flags, get_block_t, dax_iodone_t); | |
33 | #else | |
34 | static inline int dax_pmd_fault(struct vm_area_struct *vma, unsigned long addr, | |
35 | pmd_t *pmd, unsigned int flags, get_block_t gb, | |
36 | dax_iodone_t di) | |
37 | { | |
38 | return VM_FAULT_FALLBACK; | |
39 | } | |
40 | #define __dax_pmd_fault dax_pmd_fault | |
41 | #endif | |
c94c2acf MW |
42 | int dax_pfn_mkwrite(struct vm_area_struct *, struct vm_fault *); |
43 | #define dax_mkwrite(vma, vmf, gb, iod) dax_fault(vma, vmf, gb, iod) | |
44 | #define __dax_mkwrite(vma, vmf, gb, iod) __dax_fault(vma, vmf, gb, iod) | |
45 | ||
4897c765 MW |
46 | static inline bool vma_is_dax(struct vm_area_struct *vma) |
47 | { | |
48 | return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host); | |
49 | } | |
f9fe48be RZ |
50 | |
51 | static inline bool dax_mapping(struct address_space *mapping) | |
52 | { | |
53 | return mapping->host && IS_DAX(mapping->host); | |
54 | } | |
9973c98e RZ |
55 | int dax_writeback_mapping_range(struct address_space *mapping, loff_t start, |
56 | loff_t end); | |
c94c2acf | 57 | #endif |